Question 17N.2.SL.TZ0.h
| Date | November 2017 | Marks available | [Maximum mark: 3] | Reference code | 17N.2.SL.TZ0.h |
| Level | SL | Paper | 2 | Time zone | TZ0 |
| Command term | Discuss | Question number | h | Adapted from | N/A |
The graph shows the relationship between the diffusion capacity of the lungs for carbon monoxide (CO) and urine desmosines.
[Source: Reproduced with permission of the © ERS 2012. European Respiratory Journal Apr 2012, 39 (4) 839–845; DOI: 10.1183/09031936.00064611]
Discuss whether measurements of desmosine concentration would be useful for monitoring changes in the health of a patient.
[3]
a. positive correlation with COPD severity «as seen in the table»
OR
negative correlation with «CO» diffusion capacity «as seen in the graph»
b. not directly proportional/other factors affect it
c. «but» if other factors stay the same in a patient it could be an effective indicator of change
d. because the ranges are high, only change in an individual is useful
e. the measurements may be more useful for one gender than the other as differences seen in the graph
[Max 3 Marks]
